\begin{tikzpicture}
    \tkzDefPoints{0/0/B, 2/0/D, 0/1.5/A, 2/1.5/C, 3/0/M}
    \tkzDrawLines[add=0.4 and 0.4](B,D  A,C)
    \tkzLabelSegment[pos=1.5,right](B,D){$l$}
    \tkzDrawSegments(A,B  C,D)
    \tkzMarkRightAngle(A,B,D)
    \tkzMarkRightAngle(C,D,M)
    \tkzLabelPoints[above](A,C)
    \tkzLabelPoints[below](B,D)
\end{tikzpicture}

